Sometimes, Lifesycle may be logged out of LinkedIn and Twitter. This is a security procedure from LinkedIn and Twitter to prevent hacking. When this happens, you may see this message when you log in to Lifesycle.
Simply click sign in now and you will be taken to the social media settings page. Simply find the account with the red 'Re-allow (Twitter/LinkedIn) Application' box and click the box.
Then simply follow the instructions on screen (from Twitter/LinkedIn)